Photo-responsive lignin fragment-based polymers as switchable adhesives

Abstract

Easy detachable and reusable adhesives are attractive as single-use adhesive replacements to reduce waste and promote reuse, recycling, or even upcycling options. Lignin, the second most abundant polymer and a...

Grafting self-immolative poly(benzyl ether)s toward sustainable adhesive thermosets with reversible bonding and triggered de-bonding capabilities

“…In terms of molecular design, a variety of polymeric structures embedded with independent functional moieties that can be orthogonally activated to achieve the desired properties have been proposed. Recent studies have employed dynamic bond exchange, [7][8][9][10][11][12][13][14][15][16] isomerization, [17][18][19] or elimination 15,20,21 for the covalent control of adhesive performance, while non-covalent interactions such as multiple hydrogen bonds or metal coordination have also been used. 6,[22][23][24][25] However, in most cases, the covalent and noncovalent bonds individually function for adhesive properties so it is difficult to achieve rapid and comprehensive control for them; thus, persistent and/or excessive stimulation is oen required, which weakens the energy-efficient re-bonding and/or de-bonding behavior of the adhesive.…”